Developmental assumptions that are frequently regarded as constraints on elementary school science curricula are analyzed. The argument that elementary school children cannot function as experimentalists because they have not yet attained formal operational thought is not supported by the Piagetian or non-Piagetian research reviewed. (SLD)

Research indicates that classroom controversy facilitates student problem solving, creativity, perspective taking, epistemic curiosity, conceptual conflict, and transition in stages of cognitive and moral reasoning. Thus, creating controversy is an important teaching strategy for increasing learning and intellectual development. Conditions…